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The Huajidian Vacuum Circuit Breaker is a medium- and high-voltage switching device built around advanced vacuum interrupter technology, supporting voltage classes from 6kV to 40.5kV. Designed for both indoor armored switchgear and outdoor pole-mounted distribution systems, it delivers reliable arc interruption, excellent short-circuit protection, and long-term operational stability.

Manufactured by certified partner factories within China's well-established electrical equipment industry, every vacuum circuit breaker is produced under the ISO 9001 quality management system and has completed comprehensive IEC 62271 type testing. As a global electrical equipment supplier, Huajidian provides integrated services including product selection, technical configuration, certification support, and international logistics for customers across Southeast Asia, the Middle East, North America, and other global markets.

Key Product Specifications

• Standard Voltage Ratings: 12kV, 24kV, 35kV, 40.5kV
• Rated Breaking Current: 20kA, 25kA, 31.5kA (optional)
• Mechanical Service Life: ≥10,000 operating cycles
• Standards & Certifications: IEC 62271-100, CE, ATEX
• Key Benefits: Low operating noise, no fire risk, extended maintenance intervals, and modular replacement design

Core Technical Features

Sealed Vacuum Interrupter for Maintenance-Free Operation

The breaker utilizes a fully encapsulated epoxy resin vacuum interrupter that effectively eliminates internal leakage risks. The sealed design supports a maintenance-free service period of approximately 6–8 years, significantly reducing lifecycle maintenance costs.

Dual Safety Interlock Protection

Mechanical and electrical interlock systems work together to prevent incorrect switching operations, ensuring safe opening and closing procedures while eliminating the possibility of operating under unsafe load conditions.

Optional Intelligent Monitoring System

For smart grid applications, the breaker can be equipped with an RS485 Modbus communication interface, enabling real-time monitoring of contact temperature, opening and closing status, and other operating parameters for predictive maintenance and remote management.

Reliable Performance in Harsh Environments

Designed to operate reliably in temperatures ranging from -25°C to +55°C, the breaker performs consistently in dusty, humid, and lightly polluted environments, making it suitable for demanding industrial and outdoor applications.

Comprehensive Quality Assurance

Every Huajidian Vacuum Circuit Breaker undergoes strict quality management throughout production, including in-process quality inspections (IPQC), routine manufacturing audits, and Factory Acceptance Testing (FAT) with short-circuit simulation before shipment to ensure reliable field performance.

Typical Application Scenarios

Huajidian vacuum circuit breakers are widely used in:

• Solar photovoltaic and wind power plants
• Urban medium-voltage substations
• Industrial manufacturing facilities
• Data center power distribution systems
• Underground mining power distribution rooms
• Utility and EPC electrical infrastructure projects

Frequently Asked Questions

Q1: What is the difference between standard, indoor, and outdoor Huajidian vacuum circuit breakers?

A: Standard vacuum circuit breakers consist primarily of the vacuum interrupter unit and are typically integrated into customized indoor switchgear. Indoor vacuum circuit breakers are draw-out (withdrawable) designs intended for installation inside switchgear cabinets. Outdoor vacuum circuit breakers feature composite insulated poles and fully sealed weatherproof enclosures, allowing direct installation on utility poles and outdoor distribution systems.

Q2: Can Huajidian vacuum circuit breakers provide internationally recognized type test reports such as KEMA certification?

A: Yes. Huajidian's manufacturing partners provide complete IEC 62271-100 type test reports issued by internationally recognized testing organizations, including KEMA. Third-party witness testing can also be arranged before shipment upon customer request.

Q3: Does Huajidian provide switchgear design drawings and secondary wiring diagrams?

A: Yes. Huajidian's engineering team provides comprehensive technical documentation, including CAD installation drawings, secondary wiring schematics, electrical parameter matching guides, and technical support to help customers complete switchgear design and installation efficiently.